They really seem to. Mancini's word when taking over from Ventura, his plan was "to bring enthusiasm back to the national team". At least he can say confidently that he succeeded in this. Players and fans are excited for each match.
The way Insigne is playing sums it up. MOTM and most importantly player at the moment, reminds the contrast of him sitting on the bench and Ventura tries to bring on De Rossi in the last moments of a failed world cup qualification.
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This lineup should be the core for the euros imo, depending on form. Verratti coming in for Locatelli, then some changes in defense. Barella will surely start every big match.
If there were no injuries:
Insigne, Belotti, Berardi
Chiesa, Bernardeschi, Immobile
Barella, Jorginho, Verratti
Locatelli, Pellegrini, Gagliardini
Spinazzola, Chiellini, Bonucci, Di Lorenzo
Emerson, Acerbi, Romagnoli, Florenzi
Donnarumma
Sirigu, Silvestri
Leaving behind Zaniolo, Sensi, Castrovilli, Caputo, and Bastoni seems like a shame, but the competition is fierce.